Fetal Spine Flashcards
the neural tube usually closes by ___ week
6th
at 26 weeks the spinal cord tip should be at the level of ___
S1
in the late 3rd trimester the spinal cord tip should be at the level of the ___
L3
what is the transverse landmark for the C spine
clavicles
what is the transverse landmark for the T spine
heart and stomach
what is the transverse landmark for the L spine
kidneys
what is the transverse landmark for the sacral spine
bladder
___: short spine
iniencephaly
are open or closed defects more common
open
spina bifida is best evaluated after ___ weeks
22
what is the most sensitive indicator for spina bifida
banana sign
what is a defect seen spina bifida occulta after birth
dimple or tuft of hair
what is the most severe form of spina bifida
rachischisis
S/A open defects
- playing of vertebral process
- u or v shaped vertebral segment
- hermiation of tissues
what are some cranial findings associated with open defects
-smaller head
-frontal bossing
-obliteration of CM
-displacement of 4th vent
banana sign
-lemon sign
-colpocephaly
-hydrocephalus
___: abnormal lateral curvature of the spine
scoliosis
scoliosis is associated with what things
limb body wall complex and amniotic band syndrome
___: excessive posterior curvature of C/T spine
hypnosis
___: teratoma formation from the pharynx
epignathus
S/A teratoma
- complex appearance with cystic, solid calcified areas
- usually demonstrates increased vascularity
- can cause posterior enhancement
what kind of teratoma is identified as a mass protruding between the spine and the anus
sacrococcygeal teratoma
___: mermaid syndrome
sirenomelia
sirenomelia is associated with what things
- bilateral renal agenesis
- oligohydramnios
- fetal death
